Itching from Entresto: Likely Drug-Related and Requires Immediate Evaluation
Stop Entresto immediately and contact your prescribing physician, as itching can be an early warning sign of hypersensitivity reactions including potentially life-threatening angioedema, which is a known serious adverse effect of this medication 1.
Understanding the Risk
The FDA label explicitly warns that Entresto may cause angioedema, and if this occurs, the medication must be discontinued immediately and never restarted 1. While isolated itching (pruritus) is not prominently featured in the main warnings section, it can represent:
- Early hypersensitivity reaction that may progress to more serious manifestations
- Isolated drug-induced pruritus without skin lesions, which is a recognized adverse drug reaction 2
- Precursor to severe cutaneous reactions including bullous pemphigoid (documented case report with sacubitril/valsartan) 3
Clinical Evidence of Entresto-Related Itching
Research has documented specific patterns of pruritus with Entresto:
Nasal pruritus: A 2021 case series identified three patients (ages 58-73) who developed persistent nasal itching after starting sacubitril/valsartan. The itching did not respond to antihistamines but completely resolved within 3-6 months after discontinuation. Despite the medication's mortality benefit, the constant nasal pruritus so severely impacted quality of life that all patients permanently discontinued the drug 4.
Severe cutaneous reactions: A 2024 case report documented an 87-year-old woman who developed itching three months after switching from losartan to sacubitril/valsartan, which progressed to bullous pemphigoid requiring immunomodulatory treatment 3.
Immediate Action Steps
- Discontinue Entresto immediately - Do not wait for symptoms to worsen
- Assess for angioedema signs: Check for facial swelling, lip swelling, tongue swelling, or throat tightness
- Monitor airway: Any involvement of tongue, glottis, or larynx requires emergency treatment with epinephrine 1:1000 (0.3-0.5 mL subcutaneously) 1
- Document the reaction: Note timing of onset, location of itching, and any associated symptoms
Important Caveats
Higher risk populations 1:
- Black patients have higher rates of angioedema with Entresto
- Patients with prior ACE inhibitor or ARB-related angioedema (this is actually a contraindication to Entresto use)
- Patients with hereditary angioedema should not use Entresto
Do not rechallenge: The FDA label explicitly states that if angioedema occurs, "ENTRESTO must not be re-administered" 1. Given that itching may represent early hypersensitivity, attempting to restart the medication carries significant risk.
Alternative Management
Contact your cardiologist to discuss alternative heart failure therapies. The decision to discontinue Entresto should balance the drug's proven mortality benefit against the risk of progression to serious hypersensitivity reactions. However, quality of life matters - the case series demonstrated that persistent pruritus alone was sufficient reason for permanent discontinuation in real-world practice 4.
Do not attempt antihistamine treatment and continue the drug - the documented cases showed antihistamines were ineffective, and continuing the medication risks progression to more severe reactions 4, 3.